Nuclear Power Engineering
Instrumentation and Control Technologies
IAEA Independent Review Missions of NPP I&C Systems (IERICS Missions)
The first IERICS review mission was performed in February 2010 in Yongin-si, Republic of Korea at the request of the Doosan Heavy Industries and Construction Company. The subject of the review was the prototype version of Doosan's advanced I&C system designed for the APR-1400 NPPs. This system is developed based on the results of a seven-year R&D project titled Korea Nuclear Instrumentation and Control System (KNICS, 2001-2008). The KNICS project team included participants from Doosan, KAERI, KEPCO, KERI, POSCON, and Woori Tec.
Yongin-si, Republic of Korea, February 1-6, 2010
In order to demonstrate the suitability of this system in terms of performance, operability and reliability, Doosan established an "Integrated Performance Validation Facility" for further system development and testing. Doosan's goal was that the mission would provide them with a basis for improving the acceptance and reliability of the I&C system by implementing the recommendations and findings of the mission and also would assist in meeting the requirements of the on-going Shin-Ulchin Units 1 and 2 design project. It was also expected that the report would assist in developing a firm design basis for projects in the domestic and international markets.
Kirovograd, Ukraine, December 5-10, 2010
The second IERICS review mission was performed in December 2010 in Kirovograd, Ukraine, on the Field Programmable Gate Array (FPGA) based safety I&C platform and systems developed by the Research and Production Corporation (RPC) Radiy for nuclear power plants. RPC Radiy completed the development of its FPGA-based digital platform in 2002 which was designed for building I&C systems for reactor protection, control, and monitoring functions in NPPs. These digital systems, which were used in I&C modernization projects of operating NPPs, can also be integrated into new NPP designs.
The company has already completed the successful installation of these systems in more than fifty modernization projects in a total of five operating NPP sites in the Ukraine and Bulgaria. The systems included:
- Main and Secondary (diverse) Reactor Trip System (RTS)
- Engineered Safety Feature Actuation Systems (ESFAS)
- Reactor Regulating and Power Limitation System (RPCLS)
- Reactor Rod Control Systems
Moscow / Novovoronezh, Russia, December 6-15, 2012
The third IERICS review mission was performed in December 2012 in Moscow, Russia, on the VNIIAES computerized process control system for AES-2006 (VVER-1200) NPPs. The VNIIAES I&C platform is intended to perform safety and safety-related, as well as normal operational functions in NPPs. The system mainly applies microprocessor-based technology for signal processing, logic, and self-diagnostic functions.
VNIIAES has already achieved a successful implementation of parts of the system or its subsystems in several NPP applications. In order to demonstrate the suitability of this system, VNIIAES established different test and performance validation facilities, which also constituted parts of the review. The review areas covered:
- Systems important to safety (e.g. reactor shutdown system, engineered safety features actuation system, reactor instrumentation, control and diagnostics system);
- Reactor control systems for continuous normal operation;
- The computer-based platforms for the above systems;
- The upper level control system including the human-system interface of the main and emergency control rooms.
Severodonetsk, Ukraine, April 21-27, 2013
The fourth IERICS mission was implemented in Severodonetsk, Ukraine in April 2013 at the SRPA "Impulse" organization. The subject of the review was the digital computer I&C system (MSKU 3M) important for NPPs' safety, designed using standard technical solutions by SRPA "Impulse".
The scope of the review included:
Safety control system
- Engineering safety features actuation system (ESFAS)
- Support features systems
Normal operation control systems for NSSS
- NSSS process control system
- NSSS closed loop control systems and the associated human system interfaces
- Both H/W and S/W platforms were evaluated
The MSKU 3M I&C platform is intended to perform safety and safety-related, as well as normal operational functions in NPPs. The system mainly applies microprocessor-based technology for signal processing, logic, and self-diagnostic functions. SRPA "Impulse" completed the development of the system in 2011. They have already successfully implemented large parts of the system in the Zaporizhzhya NPP in Ukraine.
In all four IERICS missions, the IAEA review teams confirmed that extensive engineering work of high quality has been performed to develop the advanced I&C systems, and in general the reviewed areas met the requirements of the relevant sections of the IAEA Safety Guide NS-G-1.3. Specific issues, identified as areas for further improvement, were listed in the issue sheets of the mission report, as suggestions and recommendations. Good practices were also identified, serving as commendable engineering examples for other NPP I&C system design projects.
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